55520949 has 16 divisors (see below), whose sum is σ = 81091584. Its totient is φ = 33510000.

The previous prime is 55520939. The next prime is 55520977. The reversal of 55520949 is 94902555.

It is not a de Polignac number, because 55520949 - 2⁸ = 55520693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55520939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4932 + ... + 11634.

It is an arithmetic number, because the mean of its divisors is an integer number (5068224).

Almost surely, 2^55520949 is an apocalyptic number.

It is an amenable number.

55520949 is a deficient number, since it is larger than the sum of its proper divisors (25570635).

55520949 is a wasteful number, since it uses less digits than its factorization.

55520949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 55520949 is about 7451.2380850433. The cubic root of 55520949 is about 381.4921684936.

The spelling of 55520949 in words is "fifty-five million, five hundred twenty thousand, nine hundred forty-nine".